云南近期姚安、澄江及丘北地震的孕育  

Preparation of Recent Yaoan,Chengjiang and Qiubei Earthquakes in Yunnan

作　　者：李永莉[1] 蔡静观[1] 

机构地区：[1]云南省地震局,昆明650041

出　　处：《地震研究》2001年第3期213-218,共6页Journal of Seismological Research

摘　　要：从地震学的角度对姚安、澄江和丘北地震的孕育进行追踪研究 ,结果表明 :云南地区 3个月时间内发生多次中强震 ,震前云南省地震学的波速比、小震调制比以及震源深度等多项参数出现了中期同步异常 ,并且有区域性中小地震活跃、能量的加速—平静过程以及前兆震群出现等明显的近场异常 ,表明云南地区快速发生的多次中强地震 。Tracing study on preparation of the Yaoan,Chengjiang and Qiubei earthquakes is made from the point of view of seismology.The results show that medium-strong earthquakes occurred many times in Yunnan in three months;medium-term synchronous anomalies of seismic parameters including Vp/Vs ratio,modulating ratio of small earthquakes and focal depth as well as near-field anomalies such as activation of local medium-small earthquakes,acceleration-quiet process and precursor earthquake swarm appeared before the earthquakes in Yunnan,which manifests seismogenic features of medium-short term anomalies in seismology before many medium-strong earthquakes in Yunnan.

关 键 词：地震学参数 地震活动性 中强地震 中短期异常 云南 孕震 

分 类 号：P315.5[天文地球—地震学]